Possible Clues:

• Hinder or impede
• Be awkward in block
• Get in way of old boy with lorry largely occupying street
• Block in old boy's vehicle briefly, at end of street
• Block passage or shut out the view
• Rub Scott the wrong way to frustrate
• Block in middle of cobbled street with playing court outside
• Stymie
• Block former pupil getting Conservative in support
• Block up